I recently put an SB-201 (2 x 572B) on the air, with the assistance of
this and other groups. One modification I considered but did not add
was a soft-start. Instead, because my line voltage is at the upper
legal limit, I decided to get an autotransformer, and I use that to
bring the amp up to, and down from, full voltage (actually, about 97% of
full voltage). The wiper on the autotransformer is so stiff that it
takes me at least five seconds to get it all the way around, and I
usually go even more slowly.
I now ask whether there are additional benefits to a soft-start, or if I
accomplish the same thing with the autotransformer?
73,
Jan, KX2A
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